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| 热带印度洋偶极子发生和演变机制的数值研究 | |
| 引用本文： | 李东辉,张铭,张瑰,谭言科.热带印度洋偶极子发生和演变机制的数值研究[J].海洋科学进展,2005,23(2):135-143. |
| 作者姓名： | 李东辉 张铭 张瑰 谭言科 |
| 作者单位： | 1. 中国科学院大气物理研究所,大气科学和地球流体力学数值模拟国家重点实验室,北京,100029;解放军理工大学,气象学院,江苏,南京,211101 2. 解放军理工大学,气象学院,江苏,南京,211101 3. 解放军理工大学,理学院,江苏,南京,211101 |
| 基金项目： | 大气科学和地球流体力学数值模拟国家重点实验室开放课题——印度洋偶极子的形成机理及对我国气候影响的研究，国家自然科学基金项目——印度洋海气相互作用对亚洲夏季风建立和推进的影响(40275014) |
| 摘 要： | 对中国科学院大气物理研究所(IAP)大气科学和地球流体力学数值模拟国家重点实验室(LASG)发展的第三代海洋模式(L30T63 OGCM)进行了改进。分析了该模式1959年1月—1998年12月的40a积分结果，以此研究热带印度洋偶极子发生、发展和消亡的物理机制。对数值模拟结果的分析表明，赤道印度洋表面异常东风引起的异常环流结构是偶极子发生、发展的主要动力学原因，其表面异常东风转换为异常西风所引起的异常环流结构调整是偶极子消亡的主要动力学原因；海气界面热通量异常的交换对热带印度洋海表温度距平偶极子模态的形成和演变起着重要的作用；垂直输送作用是热带印度洋次表层海温偶极子模态发生和演变的主要物理机制。 |
| 关 键 词： | 热带印度洋偶极子 海洋环流模式 海温距平 |
| 文章编号： | 1671-6647(2005)02-0135-09 |
| 修稿时间： | 2004年9月6日 |
he Study of the Occurrence and Evolution Mechanism of the Tropical Indian Ocean Dipole |
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| LI Dong-hui,ZHANG Ming,ZHANG Gui,TAN Yan-ke.he Study of the Occurrence and Evolution Mechanism of the Tropical Indian Ocean Dipole[J].Advances in Marine Science,2005,23(2):135-143. | |
| Authors: | LI Dong-hui ZHANG Ming ZHANG Gui TAN Yan-ke |
| Institution: | LI Dong-hui 1,2,ZHANG Ming 2,Zhang Gui 3,TAN Yan-ke 2 |
| Abstract: | The third generation ocean model developed by the State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG) has been improved, and the integrated results of the improved model from January, 1959 to December, 1998 are analyzed to study the physical mechanism of occurrence, development and disappearance of the tropical Indian Ocean dipole. It is shown from analysis results that the anomalous circulation structure caused by the surface anomalous easterly wind over the equatorial Indian Ocean is the main dynamic reason for the dipole occurrence and development, and the anomalous circulation structure adjustment caused by the change from the surface anomalous easterly wind to anomalous westerly wind is the main dynamic reason for the dipole disappearance. The anomalous air-sea heat flux exchange plays an important role in the formation and evolution of SST anomaly dipole mode in the tropical Indian Ocean, and the vertical transport effect is the main physical mechanism of the occurrence and evolution of subsurface ocean temperature dipole mode in the tropical Indian Ocean. |
| Keywords: | tropical Indian Ocean dipole ocean circulation model ocean temperature anomaly |
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